KEYCLOAK-1066 Kerberos credential delegation support

distribution/modules/build.xml

@@ -236,6 +236,8 @@
             <maven-resource group="org.keycloak" artifact="keycloak-kerberos-federation"/>
         </module-def>
 
+        <module-def name="sun.jdk.jgss"></module-def>
+
         <module-def name="org.keycloak.keycloak-ldap-federation">
             <maven-resource group="org.keycloak" artifact="keycloak-ldap-federation"/>
         </module-def>